application: config_snapshots, admin, providers, iptv

crates/application/src/config_snapshots/restore.rs

@@ -0,0 +1,43 @@
+use domain::models::Channel;
+use domain::value_objects::ChannelId;
+use domain::{DomainError, DomainResult};
+
+use super::commands::RestoreSnapshotCommand;
+use super::deps::ConfigSnapshotDeps;
+
+/// Restore a channel's config from a snapshot.
+///
+/// Flow: find snapshot -> find channel -> snapshot current config (backup) ->
+/// apply snapshot config to channel -> save channel -> return updated channel.
+pub async fn execute(
+    deps: &ConfigSnapshotDeps,
+    cmd: RestoreSnapshotCommand,
+) -> DomainResult<Channel> {
+    let channel_id = ChannelId::from(cmd.channel_id);
+
+    let snapshot = deps
+        .channel_query
+        .get_config_snapshot(channel_id, cmd.snapshot_id)
+        .await?
+        .ok_or(DomainError::ValidationError(format!(
+            "Snapshot {} not found",
+            cmd.snapshot_id
+        )))?;
+
+    let mut channel = deps
+        .channel_query
+        .find_by_id(channel_id)
+        .await?
+        .ok_or(DomainError::ChannelNotFound(cmd.channel_id))?;
+
+    // Auto-snapshot the current config before overwriting
+    deps.channel_command
+        .save_config_snapshot(channel_id, channel.schedule_config(), None)
+        .await?;
+
+    // Apply the snapshot's config
+    channel.set_schedule_config(snapshot.config().clone());
+    deps.channel_command.save(&channel).await?;
+
+    Ok(channel)
+}